need some advice with box design

i drafted my box on some graphing paper and wanted to know what some of the experienced box builders thought about it. It has 2 sub boxes (left/right) and the center peice is the ports(rear of sub box to middle of center peice). each box will have 1.7ft^3 of airspace(built with 3/4" material). built for a 10" sub. Anyone have any idea or comments about it? Here are the pictures